A.A1 B.B1 C.A2 D.B2
A.±20 B.±4.6 C.±10
A.0.3-0.4dB/km;0.15-0.25dB/km B.0.5-1.0dB/km;0.3-0.5dB/km C.0.5dB/km;1.0dB/km D.0.15-0.25dB/km;0.3-0.4dB/km